So I know that the ending ~mashita means 'has', and ~mashou means 'lets' but what other endings are there? I've only learned those two. Oh, and on which words can you put those endings on? Oh and one more question if you dont mind(I know asking a lot of questions can be annoying

) But anyways, my last question is how do you know when to start the new ending??
For example: Narimasu means 'to beome'
And if you want to say 'has become' then you say narimashita but how do you know where to take out letters in the word and replace them with the new endings?? Please help me on this, thank you

I hope you understand my questions
